Takeuchi TB370 Hydraulic Excavator Workshop Manual (CQ2E024) (SN 170000007-)
The TB370 usually spends its life loading trucks, trenching services and working around tight sites where downtime hurts. This workshop manual is what I’d pull out when I need a clear, step‑by‑step sequence to strip, inspect and correctly reinstall major components without guesswork. If, for example, the boom won’t hold position or drifts under load, this book helps you trace the issue through the hydraulic circuit, verify clearances and seals, then reassemble everything so it’s tight and safe to go back in the trench.
Applications & Use Cases
- Plan major repairs on the upperstructure, boom, arm and undercarriage with a logical teardown and reassembly order.
- Trace hydraulic faults by following the recommended checks before condemning pumps, valves or cylinders.
- Inspect wear points on pins, bushings and slew components and decide what must be replaced now versus monitored.
- Align and adjust controls so travel, swing and work functions respond evenly after component replacement.
- Verify safe reinstallation of guards, lines and hoses after routing or bleeding work is complete.
FAQ
Q: Can I use this manual on a tablet in the field?
A: Yes, it’s practical on a tablet; you can zoom diagrams and keep it open next to the machine while you work.
Q: Is it worth printing sections of this manual?
A: Printing key procedures is handy for greasy jobs, so you can mark notes and not worry about damaging your device.
Safety Note
Always lock out, support and relieve system pressure exactly as described before loosening any component.
Takeuchi TB370 Hydraulic Excavator Index:
- REVISION HISTORY
- FOREWORD
- Directional terms: front, rear, left, right
- Machine serial number
- Symbols used in this manual
- Manual structure
- 1. SAFETY
- SAFETY ALERT SYMBOL
- SAFETY PRECAUTIONS
- Observe all safety rules
- Wear safe clothing and protective gear
- Install an extinguisher and a first aid kit
- Lockout/Tagout (LOTO)
- Use the correct tools
- Regularly replace the safety-critical parts
- Explosionproof lighting
- Prohibit access by unauthorized persons
- Prepare the work area
- When the canopy is tilted up
- Keep the machine clean
- Stop the engine before performing maintenance
- Keep clear of the moving fan and belt
- When working under the machine
- When working on the machine
- Securing the working equipment
- Secure the engine hood and guard when they are open
- Place heavy components in a stable position
- Caution when filling with fuel or oil
- Handling of hoses
- Be careful with hot and pressurized components
- Handling of radiator
- Be careful with oils under pressure
- Release the residual pressure from the hydraulic system before performing maintenance
- Be careful with grease under pressure
- Handling of the accumulator
- Disconnect the battery
- Use caution when handling batteries
- Have a service agent repair welding cracks or other damage
- Checks after maintenance
- Disposing of wastes
- CAUTIONS WHEN WORKING
- Before starting work
- When disassembling or assembling
- When removing/installing the hydraulic unit
- When connecting/disconnecting the hoses or pipes
- Handling of seals
- Pressure adjustment for hydraulic devices
- 2. SERVICE DATA
- DIMENSIONAL DRAWING
- Machine dimensions
- Work range
- SPECIFICATION TABLE
- Performance
- Completed machine dimensions
- Main unit dimensions
- Engine
- Hydraulic equipment
- Control equipment
- Instrument
- Switch
- Slew equipment
- Lower machinery
- Work equipment
- Work dimensions
- Main construction
- Hydraulic cylinder
- Digging force
- Blade
- TABLE OF MASSES
- Upper structure
- Lower structure
- Attachment
- TABLE OF FUEL AND LUBRICANT
- Diesel fuel
- Lubricant
- Supply oil level
- PERFORMANCE EVALUATION STANDARD
- Table of standard values
- Table of hydraulic pump assignment
- Hydraulic pump No. P1
- Hydraulic pump No. P2
- Hydraulic pump No. P3
- Performance inspection guideline
- 1. Engine speed
- 2. Hydraulic pressure
- 3. Cylinder operating speed
- 4. Slew speed (two turns)
- 5. Slewing stop overrun
- 6. Five-minute natural travel drop
- 7. Five-minute natural slew drop
- 8. Travel speed (10 m (32.8 ft))
- 9. Travel speed (five rotations)
- 10. Straight-ahead travel (10 m (32.8 ft))
- 11. Straight-ahead travel function check
- 12. Amount of natural cylinder drop
- 13. Backlash
- 14. Blade levelness
- 15. Blade height
- 16. Service flow rate
- 17. Slew bearing play
- TIGHTENING TORQUE
- Hydraulic hose
- Bite-type pipe fitting for steel pipe
- Joint for piping
- Joint for piping (O-ring seal type)
- Bolts and nuts (JIS strength category 10.9)
- HYDRAULIC CIRCUIT DIAGRAM
- Mono-boom specification
- For Austria or UK
- Standard blade specification
- Angle blade specification
- Other
- Two-piece boom specification
- Multifunctional grip specification
- ELECTRICAL CIRCUIT DIAGRAM
- Symbols in electrical circuit diagram
- Wire color symbols
- Wire color table
- Schematic diagram
- Serial No.: 170000007 to 170000033
- Serial No.: 170000034 to 170000466
- Serial No.: 170000467 to 170000733
- Serial No.: 170000734 to 170000948
- Serial No.: 170000949 to 170002105
- Serial No.: 170002106 to 170002557
- Serial No.: 170002558 to 170002634
- Serial No.: 170002635 to 170002779
- Serial No.: 170002780 or later
- WIRE HARNESS
- Electrical wiring assembly
- Main unit wiring assembly
- Engine wiring assembly
- Cab wiring assembly
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Other wire harnesses
- GPS assembly
- Rear camera assembly
- Wire harness
- Wire harness
- 270° camera assembly
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Wire harness
- Cable
- Control valve assembly
- Wire harness
- Wire harness
- Control valve assembly
- Boom light assembly
- Wire harness
- Wire harness
- Boom light assembly
- Wire harness
- Wire harness
- Cover assembly
- Cab mounting assembly
- Switch assembly
- Rear light assembly
- Cab light assembly
- Harness supplied with engine
- HYDRAULIC DEVICE LAYOUT DIAGRAM
- 3. FUNCTION
- HYDRAULIC PUMP
- Cylinder block group
- Swash plate group
- Valve cover group
- Control section
- Horsepower control regulator
- Load-sensing control regulator
- GEAR PUMP
- CONTROL VALVE
- Unload valve
- Travel (left), travel (right)
- 1st service, boom
- Arm
- Two-piece boom, bucket, swing, blade
- 3rd service
- Slew, 2nd service, 4th service
- PT signal circuit
- PA signal circuit
- Main relief valve operation
- Overload relief valve operation
- PILOT VALVE (CONTROL LEVER)
- PILOT VALVE (SWING)
- PILOT VALVE (BLADE)
- PILOT VALVE (TRAVEL)
- EMERGENCY SHUTOFF VALVE
- EMERGENCY SHUTOFF VALVE
- Spool at the neutral position
- When oil flows from port A to port B
- When oil flows from port B to port A
- When an abnormal high pressure is produced in the cylinder
- EMERGENCY SHUTOFF VALVE
- PROPORTIONAL SOLENOID VALVE (1ST SERVICE / 2ND SERVICE)
- SOLENOID VALVE
- Solenoid valve
- Relief valve
- SOLENOID VALVE (3RD AUXILIARY LINE PIPING)
- SOLENOID VALVE
- SOLENOID VALVE (3RD SERVICE HARD LOCK)
- SOLENOID VALVE (1ST SERVICE PRESSURE ADJUSTMENT, 1ST SERVICE AUTO TANK)
- Construction diagram
- Operating principle
- Check valve
- Solenoid valve
- Relief valve
- SELECTOR VALVE
- CYLINDER
- Functions of parts
- Rod cover assembly
- Seal system configuration: Bushing (4), buffer ring (6), rod packing (7), backup ring (8), dust seal (9)
- Piston assembly
- Operation
- Basic function
- Cushion function
- TRAVEL MOTOR
- Reduction gear
- Function
- Description for operation
- Hydraulic motor
- Motor function
- Motor construction and operating principle
- 2-speed motor operating principle
- Hydraulic valve
- Counterbalance valve
- Automatic 1st speed valve
- Parking brake
- SLEW MOTOR
- Reduction gears
- Hydraulic motor
- Hydraulic valves
- Shockless relief valve
- Check valve
- Timer valve
- Reversal prevention valve
- SWIVEL JOINT
- 4. DISASSEMBLY AND ASSEMBLY
- SERVICE STANDARD
- Carrier roller
- Track roller
- Sprocket
- Idler
- Pin to bushing clearance
- About replacement of pin and bushing
- About replacement of pin and bushing
- DRIVE EQUIPMENT
- Assembly of engine
- Construction diagram
- Engine assembly
- Construction diagram
- Radiator assembly
- Construction diagram
- Removal of engine
- Installation of engine
- Assembly of hydraulic pump
- Construction diagram
- Removal of hydraulic pump
- Installation of hydraulic pump
- Precautions when starting the hydraulic pump
- Assembly of fuel tank
- Construction diagram
- Fuel tank assembly
- Construction diagram
- Assembly of toolbox
- Assembly of fuel supply oil pump
- Construction diagram
- Removal of fuel tank
- Installation of fuel tank
- Replacement of the fuel tank cap packing
- Assembly of battery
- Construction diagram
- Removal of battery
- Installation of battery
- TRAVEL EQUIPMENT
- Assembly of track roller
- Assembly of carrier roller
- Assembly of front idler
- Assembly of grease cylinder
- Assembly of travel motor
- Assembly of lower frame
- Assembly of rubber crawler
- Construction diagram
- Removal of rubber crawler
- Installation of rubber crawler
- Removal of carrier roller
- Installation of carrier roller
- Removal of track roller
- Installation of track roller
- Removal of front idler assembly
- Installation of front idler assembly
- Removal of travel motor
- Installation of travel motor
- SLEW EQIUPMENT
- Assembly of slew motor
- Construction diagram
- Removal of slew motor
- Installation of slew motor
- Assembly of slew bearing
- Construction diagram
- Removal of slew bearing
- Installation of slew bearing
- Assembly of swivel joint
- Construction diagram
- Removal of swivel joint
- Installation of swivel joint
- UPPER FRAME
- Assembly of main unit
- Construction diagram
- Counterweight assembly
- Construction diagram
- Assembly of grease piping
- Construction diagram
- Removal of upper frame
- Installation of upper frame
- Assembly of cover
- Construction diagram
- Side cover assembly
- Construction diagram
- Engine cover assembly
- Construction diagram
- Removal of cover
- Installation of cover
- Assembly of cab mounting
- Construction diagram
- Cab assembly
- Construction diagram
- Door assembly
- Construction diagram
- Front sash assembly
- Construction diagram
- Side sash (right) assembly
- Construction diagram
- Assembly of cab interior
- Assembly of switch
- Assembly of floor frame
- Construction diagram
- Floor frame assembly
- Construction diagram
- Assembly of operator seat
- Assembly of radio
- Assembly of side light
- Assembly of floor mat
- Assembly of rain guard
- Assembly of rear light
- Assembly of front light
- Assembly of roof guard
- Assembly of washer tank
- Construction diagram
- Removal of cab
- Installation of cab
- Removal of glass
- Installation of glass
- CONTROL EQUIPMENT
- Construction diagram
- Assembly of control lever
- Assembly of blade control lever
- Assembly of pilot piping
- Assembly of pilot piping
- Assembly of right control box
- Assembly of left control box
- Assembly of pilot valve (right operation lever) bracket
- Assembly of pilot valve (left operation lever) bracket
- Multifunctional grip
- Disassembly and assembly
- Removal and installation of the accumulator
- Precautions for assembly of the multifunctional grip
- WORK EQUIPMENT
- Construction diagram
- Assembly of arm
- Assembly of arm
- Assembly of boom
- Assembly of boom
- Assembly of boom swing
- Assembly of front light
- Assembly of front light
- Assembly of blade
- Disassembly and assembly
- Removal and installation of the bucket
- Release of residual pressure
- Removal and installation of the link and guide link
- Removal and installation of the arm
- Removal and installation of the boom
- Removal and installation of the boom bracket
- Removal and installation of the blade
- HYDRAULIC OIL TANK
- Assembly of hydraulic oil tank
- Construction diagram
- Removal of hydraulic oil tank
- Installation of hydraulic oil tank
- Oil level inspection and replenishment of hydraulic oil tank
- Method for bleeding air
- HYDRAULIC PUMP
- Construction
- Disassembly and Assembly
- Inspection
- GEAR PUMP
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- Checking the parts
- Test operation
- Measuring the discharge volume
- CONTROL VALVE
- Construction diagram
- Control valve
- Control valve
- Control valve
- Control valve
- P1 inlet section
- Right travel section
- Left travel section
- Arm section
- 1st service section
- Boom section
- Two-piece boom section
- Bucket section
- Swing section
- Blade section
- P2 inlet section
- 3rd service section
- Slew section
- 2nd service section
- 4th service section
- Disassembly
- Removing the relief valve assemblies, shutoff valve, and anti-void valve
- Removing each section
- Disassembling the P1 inlet section
- Disassembling each section (right travel and left travel)
- Disassembling each section (arm, 1st service, and boom)
- Disassembling each section (two-piece boom, bucket, swing, and blade)
- Disassembling the P2 inlet section
- Disassembling the 3rd service section
- Disassembling the slew section
- Disassembling each service section (2nd service and 4th service)
- Cleaning the parts
- Inspecting the parts
- Assembly
- Replacing the relief valve
- Operation
- PILOT VALVE (CONTROL LEVER)
- Construction
- Special tools
- Installation jig A
- Installation jig B
- Disassembly and Assembly
- Inspection and adjustment
- PILOT VALVE (SWING, BLADE)
- Construction
- Special Jigs
- Disassembly and Assembly
- Inspection and adjustment
- PILOT VALVE (TRAVEL)
- Construction
- Disassembly and Assembly
- Special Jigs
- Disassembly
- Assembly
- Inspection and adjustment
- PROPORTIONAL SOLENOID VALVE (1ST/2ND SERVICE)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- EMERGENCY SHUTOFF VALVE
- SOLENOID VALVE (ANGLE BLADE)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- SOLENOID VALVE (BLADE FLOAT)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- SOLENOID VALVE (3RD AUXILIARY LINE PIPING)
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- SOLENOID VALVE (LEVER LOCK)
- Construction
- Disassembly
- Solenoid valve
- Relief valve
- Check valve
- Assembly
- Inspection and adjustment
- SOLENOID VALVE (3RD SERVICE HARD LOCK)
- Construction diagram
- Disassembly and assembly
- Disassembly of solenoid valve
- Assembly of solenoid valve
- SOLENOID VALVE
- Construction diagram
- Disassembly and assembly
- SELECTOR VALVE
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- CYLINDER
- Construction diagram
- Boom cylinder
- Tow-piece boom cylinder
- Arm cylinder
- Bucket cylinder
- Swing cylinder
- Blade cylinder
- Disassembly
- Disassembling the cylinder
- Washing and storage
- Assembly
- Assembling the cylinder
- Start-up operation
- CYLINDER
- ANGLE CYLINDER
- Construction
- Disassembly and Assembly
- Special tools
- Disassembly
- Assembly
- Inspection and adjustment
- Inspection after disassembly
- Inspection after assembly
- TRAVEL MOTOR
- Construction diagram
- Hydraulic motor
- Reduction gears
- Counterbalance valve, 2nd-speed control valve, relief block assembly
- Disassembly and assembly
- Inspection and adjustment
- SLEW MOTOR
- Construction diagram
- Reduction gearbox
- Hydraulic motor
- Relief valve
- Timer valve
- Reversal prevention valve
- Disassembly
- Tools required
- Disassembling the hydraulic motor
- Disassembling the reduction gearbox
- Assembly
- Assembling the hydraulic motor
- Assembling the reduction gearbox
- SWIVEL JOINT
- Construction
- Disassembly and Assembly
- Inspection and adjustment
- Inspection procedures and remedial actions
- Use limit for parts
- Inspection after assembly
- SWIVEL JOINT (EQUIPPED WITH ANGLE BLADE)
- Construction
- Disassembly and Assembly
- Removal jig
- Disassembly
- Assembly
- Inspection and adjustment
- Inspection procedures and remedial actions
- Use limit for parts
- Inspection after assembly
- MAIN UNIT HYDRAULIC PIPING & LOWER HYDRAULIC PIPING
- Main unit hydraulic piping assembly
- Main unit hydraulic piping assembly
- Lower hydraulic piping assembly
- 5. TROUBLESHOOTING
- TROUBLESHOOTING
- Notes on the malfunction diagnosis and repair
- GENERAL
- The engine does not start.
- 1. Did any error code occur?
- 2. Does the starter motor rotate?
- 3. Is there enough fuel?
- 4. Is the fuel filter clogged?
- The engine speed cannot be increased.
- 1. Did any error code occur?
- All the attachments and travel motors are inoperable.
- 1. Did any vehicle error code occur?
- 2. Is the hydraulic oil above the specified amount?
- 3. Is the pilot pressure within the standard value range?
- 4. Is the main pressure within the standard value range?
- All the attachments and travel motors are operable but are slow.
- 1. Does the engine speed reach the maximum?
- 2. Is the hydraulic oil above the specified amount?
- 3. Is abnormal sound coming from the hydraulic pump?
- 4. Is the pilot pressure within the standard value range?
- 5. Is the main pressure within the standard value range?
- TRAVEL
- The travel motors are inoperable (both left and right or one of them).
- 1. Do hydraulic devices other than the travel motor operate?
- 2. Is the discharge pressure from the pilot valve (for travel operation) normal?
- 3. Is the discharge pressure from the control valve (travel section) normal?
- 4. Is the discharge pressure from the swivel joint normal?
- The vehicle veers to one side with the left or right travel speed slowing down when it travels forward or backward.
- 1. Is the tension of the crawler normal?
- 2. Is any foreign matter trapped in the crawler?
- 3. Is the discharge pressure from the pilot valve (for travel operation) normal?
- 4. Is the discharge pressure from the control valve (travel section) normal?
- 5. Is the discharge pressure from the swivel joint normal?
- The travel speed cannot be changed.
- 1. Is the voltage applied to the solenoid valve (for variable travel speed)?
- 2. Is the variable travel speed pressure from the solenoid valve (for variable travel speed) normal?
- 3. Is the variable travel speed pressure (pilot pressure) from the swivel joint normal?
- SLEW
- The vehicle cannot slew.
- 1. Do hydraulic devices other than the slew operate?
- 2. Is the slew pressure within the standard value range?
- 3. Is the hydraulic piping that supplies the slew brake release pressure abnormal?
- 4. Does the slew bearing rotate?
- 5. Is the discharge pressure from the pilot valve (for slew operation) normal?
- 6. Is the discharge pressure from the control valve (slew section) normal?
- The vehicle cannot slew to the left or right.
- 1. Is the slew pressure within the standard value range?
- 2. Is the hydraulic piping that supplies the slew brake release pressure abnormal?
- 3. Is the discharge pressure from the pilot valve (for slew operation) normal?
- 4. Is the discharge pressure (main pressure) from the control valve (slew section) normal?
- 5. Is the slew relief valve normal?
- The vehicle can slew but is slow and less powerful.
- 1. Do hydraulic devices other than the slew operate normally?
- 2. Is the slew pressure below the standard value range?
- 3. Is the slew relief valve or relief valve seat abnormal?
- 4. Is the discharge pressure from the pilot valve (for slew operation) normal?
- 5. Is the discharge pressure from the control valve (slew section) normal?
- The slewing stop flow amount is large or the vehicle cannot stop.
- 1. Is the slew pressure below the standard value range?
- 2. Can the pilot valve (for slew operation) be in the neutral status?
- 3. Can the control valve (slew section) be in the neutral status?
- BOOM
- The boom cannot rise or drop.
- 1. Do hydraulic devices other than the boom operate?
- 2. Is the discharge pressure from the pilot valve (for boom operation) normal?
- 3. Is the discharge pressure from the control valve (boom section) normal?
- The boom can rise and drop but is slow and less powerful.
- 1. Do hydraulic devices other than the boom operate normally?
- 2. Is the discharge pressure from the pilot valve (for boom operation) normal?
- 3. Is the discharge pressure from the control valve (boom section) normal?
- 4. Is the boom cylinder internally leaking?
- The boom drops temporarily when the boom control lever is slowly pulled.
- 1. Is the boom cylinder internally leaking?
- The amount of boom natural drop is large.
- 1. Is the boom cylinder internally leaking?
- 2. Is the boom emergency shutoff valve internally leaking?
- ARM
- The arm cannot be pushed or pulled.
- 1. Do hydraulic devices other than the arm operate?
- 2. Is the discharge pressure from the pilot valve (for arm operation) normal?
- 3. Is the discharge pressure from the control valve (arm section) normal?
- The arm can be pushed and pulled but is slow and less powerful.
- 1. Do hydraulic devices other than the arm operate normally?
- 2. Is the discharge pressure from the pilot valve (for arm operation) normal?
- 3. Is the discharge pressure from the control valve (arm section) normal?
- The amount of arm natural drop is large.
- 1. Is the arm emergency shutoff valve internally leaking?
- BUCKET
- The bucket cannot dig or remove the ground.
- 1. Do hydraulic devices other than the bucket operate?
- 2. Is the discharge pressure from the pilot valve (for bucket operation) normal?
- 3. Is the discharge pressure from the control valve (bucket section) normal?
- The bucket can dig and remove the ground but is slow and less powerful.
- 1. Do hydraulic devices other than the bucket operate normally?
- 2. Is the discharge pressure from the pilot valve (for bucket operation) normal?
- 3. Is the discharge pressure from the control valve (bucket section) normal?
- The amount of bucket natural drop is large.
- 1. Is the hydraulic piping connected to the bucket cylinder failing, such as leaking?
- ADJUSTER (TWO-PIECE BOOM)
- The adjuster cannot rise or drop.
- 1. Do hydraulic devices other than the adjuster operate?
- 2. Is the discharge pressure from the pilot valve (for adjuster operation) normal?
- 3. Is the discharge pressure from the control valve (adjuster section) normal?
- The adjuster can rise and drop but is slow and less powerful.
- 1. Do hydraulic devices other than the adjuster operate normally?
- 2. Is the discharge pressure from the pilot valve (for adjuster operation) normal?
- 3. Is the discharge pressure from the control valve (adjuster section) normal?
- The amount of adjuster natural drop is large.
- 1. Is the adjuster emergency shutoff valve internally leaking?
- BLADE
- The blade does not rise or drop.
- 1. Do hydraulic devices other than the blade operate?
- 2. Is the discharge pressure from the pilot valve (for blade operation) normal?
- 3. Is the discharge pressure from the control valve (blade section) normal?
- 4. Is the discharge pressure from the swivel joint normal?
- The blade can rise and drop but is slow and less powerful.
- 1. Do hydraulic devices other than the blade operate normally?
- 2. Is the discharge pressure from the pilot valve (for blade operation) normal?
- 3. Is the discharge pressure (main pressure) from the control valve (blade section) normal?
- 4. Is the discharge pressure (main pressure) from the swivel joint normal?
- The amount of blade natural drop is large.
- 1. Is the hydraulic piping connected to the blade cylinder failing, such as leaking?
- SERVICE
- The attachment connected to the 1st service is inoperable.
- 1. Do hydraulic devices other than the 1st service operate?
- 2. Is the voltage applied to the proportional solenoid valve (for 1st service)?
- 3. Is the pressure on the 1st service A and B within the standard value range?
- 4. Is the discharge pressure from the proportional solenoid valve (for 1st service) normal?
- The attachment connected to the 2nd service is inoperable.
- 1. Do hydraulic devices other than the 2nd service operate?
- 2. Is the voltage applied to the solenoid valve (for 2nd service and 4th service switching)?
- 3. Is the voltage applied to the proportional solenoid valve (for 2nd service)?
- 4. Is the pressure on the 2nd service A and B within the standard value range?
- 5. Is the discharge pressure from the proportional solenoid valve (for 2nd service) normal?
- 6. Is the discharge pressure from the control valve (2nd service section) normal?
- The quick-hitch cannot be locked (3rd service).
- 1. Do hydraulic devices other than the quick-hitch operate?
- 2. Is the pressure on the 3rd service A normal?
- 3. Is the hydraulic piping connected to the 3rd service A failing?
- The quick-hitch cannot be unlocked (3rd service).
- 1. Do hydraulic devices other than the quick-hitch operate?
- 2. Is the pressure on the 3rd service B within the standard value range?
- 3. Is the voltage applied to the solenoid valve (for 3rd service)?
- 4. Is the discharge pressure from the solenoid valve (for 3rd service) normal?
- HYDRAULIC PUMP
- GEAR PUMP
- PILOT VALVE
- PILOT VALVE (SWING, BLADE)
- PILOT VALVE (TRAVEL)
- SOLENOID VALVE (LEVER LOCK)
- SOLENOID VALVE (3RD SERVICE)
- SOLENOID VALVE (ANGLE BLADE)
- CYLINDER
- Troubleshooting problems with the cylinder
- 6. OTHER
- MAINTENANCE SOFTWARE MANUAL
- CONTENTS
- 1. OVERVIEW
- 2. CONNECTION METHOD
- 2-1. Parts needed
- 2-2. Installation method
- 2-2-1. Installation of “PLUS+1 Service Tool”
- 2-2-2. Installation of maintenance tool driver
- 2-3. Connection to work machine and startup of maintenance software
- AIR CONDITIONER
- Operating principle
- HVAC
- HVAC (Heating, Ventilating and Air Conditioning)
- Air cycle
- Components
- Evaporator
- Expansion valve
- Compressor
- Condenser
- Receiver dryer
- Controller
- Fan drive
- Relay
- Actuator
- Thermistor (evaporator sensor)
- Pressure switch
- Disassembly and assembly
- Construction diagram
- Assembly of compressor
- Assembly of condenser
- Assembly of air conditioner unit
- Air conditioner unit
- Removing compressor
- Installing compressor
- Removing condenser
- Installing condenser
- Removing receiver dryer
- Installing receiver dryer
- Removing air conditioner unit
- Installing the air conditioner unit
- Replacing air conditioner unit components
- GRIP BUTTON FUNCTION ASSIGNMENT CHANGE
- Overview
- Procedure
- Changing the function nameplates
- CALIBRATION OF 270° CAMERA
- 1. Overview
- 270° camera calibration
- When calibration is required
- 2. Parts needed
- 3. Calibration procedure
- TABLE OF VEHICLE ERROR CODES
- TROUBLESHOOTING BY VEHICLE ERROR CODE
- 9: Key ON detection not possible
- 402: CAN0 communication error
- 502: CAN communication error (ECU)
- 602: CAN communication error (cluster)
- 612: CAN communication error (sub-controller [OX])
- 632: CAN communication error (sub-controller [OX2])
- 702: CAN communication error (HVAC)
- 812: CAN communication error (switch assembly)
- 822: CAN communication error (immobilizer)
- 832: CAN communication error (dial switch)
- 842: CAN communication error (radio)
- 1703: Main controller power supply voltage error (high voltage)
- 1704: Main controller power supply voltage error (low voltage)
- 1713: Sub-controller (OX) power supply voltage error (high voltage)
- 1714: Sub-controller (OX) power supply voltage error (low voltage)
- 1743: Sub-controller (OX2) power supply voltage error (high voltage)
- 1744: Sub-controller (OX2) power supply voltage error (low voltage)
- 2503: Sensor voltage error (high voltage)
- 2504: Sensor voltage error (low voltage)
- 3300: Alternator charge fault
- 3360: DPF full (Lv2)
- 3370: DPF full (Lv1)
- 3380: DPF ash load
- 3401: Engine oil pressure error
- 3500: Overheating
- 3600: Air cleaner clogging
- 3700: Water separator warning
- 3843: CCV heater 1 (IN) voltage error (high voltage)
- 3844: CCV heater 1 (IN) voltage error (low voltage)
- 3853: CCV heater 2 (OUT) voltage error (high voltage)
- 3854: CCV heater 2 (OUT) voltage error (low voltage)
- 5503: Fuel sender voltage error (high voltage)
- 5504: Fuel sender voltage error (low voltage)
- 5603: Lift alarm sensor error (short circuit)
- 5604: Lift alarm sensor error (break in the wiring)
- 6503: 1st service slide switch voltage error (high voltage)
- 6504: 1st service slide switch voltage error (low voltage)
- 6509: 1st service slide switch neutral position error
- 6519: 1st service A button error
- 6529: 1st service B button error
- 6603: 2nd service slide switch voltage error (high voltage)
- 6604: 2nd service slide switch voltage error (low voltage)
- 6609: 2nd service slide switch neutral position error
- 6709: 3rd service operation button/3rd service operation switch error
- 6719: 3rd service operation switch error
- 6859: Low grease level
- 6903: Left grip slide switch 1 voltage error (high voltage)
- 6904: Left grip slide switch 1 voltage error (low voltage)
- 6909: Left grip slide switch 1 neutral position error
- 6913: Left grip slide switch 2 voltage error (high voltage)
- 6914: Left grip slide switch 2 voltage error (low voltage)
- 6919: Left grip slide switch 2 neutral position error
- 6923: Right grip slide switch 1 voltage error (high voltage)
- 6924: Right grip slide switch 1 voltage error (low voltage)
- 6929: Right grip slide switch 1 neutral position error
- 6933: Right grip slide switch 2 voltage error (high voltage)
- 6934: Right grip slide switch 2 voltage error (low voltage)
- 6939: Right grip slide switch 2 neutral position error
- 8005: Hydraulic pump PWM output current error (low current)
- 8015: 1st service (A) PWM output current error (low current)
- 8025: 1st service (B) PWM output current error (low current)
- 8035: 2nd service (C) PWM output current error (low current)
- 8045: 2nd service (D) PWM output current error (low current)
- 8715: Proportional solenoid valve (1st service) output current error (low current)
- 8725: Proportional solenoid valve (2nd service) output current error (low current)
- 8735: 4th service (E) PWM output current error (low current)
- 8745: 4th service (F) PWM output current error (low current)
- TABLE OF ENGINE ERROR CODES
Takeuchi
